1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
|
// Copyright 2015 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
//go:build ignore
// +build ignore
// Custom image resizer. Saved for posterity.
package main
import (
"flag"
"fmt"
"image"
"image/jpeg"
_ "image/png"
"log"
"os"
"golang.org/x/image/draw"
)
var n = flag.Int("n", 0, "number of pixels to inset before scaling")
func main() {
flag.Parse()
fmt.Println(flag.Args())
for _, s := range flag.Args() {
resize(s)
}
}
func resize(s string) {
in, err := os.Open(s)
if err != nil {
log.Fatal(err)
}
defer in.Close()
src, _, err := image.Decode(in)
if err != nil {
log.Fatal(err)
}
name := "../" + s
out, err := os.Create(name)
fmt.Println(name)
if err != nil {
log.Fatal(err)
}
defer out.Close()
dst := image.NewGray(image.Rect(0, 0, 256, 256))
draw.Draw(dst, dst.Bounds(), image.White, image.ZP, draw.Src)
dr := image.Rect(*n, *n, 256-*n, 256-*n)
draw.ApproxBiLinear.Scale(dst, dr, src, src.Bounds(), draw.Src, nil)
err = jpeg.Encode(out, dst, nil)
if err != nil {
log.Fatal(err)
}
}
|
